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- 1full form of amu is...Atomic mass unit
- 21amu is also called...1dalton/ 1avogram/ 1aston
- 3what is 1 atomic mass unit?1/12th of a C-12 isotope
- 412amu(C-12isotope) = ? grams1.9924*10^-23
- 51amu = ? grams1.66*10^-24 grams
- 6how many amu are there in 1 atom of: hydrogen oxygen c12 isotope chlorine nitrogen sodium sulphurH=1amu
O=16amu
C12=12amu
Cl=35amu/37amu
N=14amu
Na=23amu
S=32amu - 7how do you calculate mass f 1 atom of oxygen in grams?1amu=1.66*10^-24 grams
16amu(1 oxygen atom)=
=16*1.66*10^-24 grams
=2.656*10^-23 grams - 8atomic mass of an element means...mass of one atom of THAT element in AMU
eg. atomic mass of oxygen=16amu - 9formula of average isotopic mass is...section formula: (m*a+n*b)/=m+n
where, a,b= isotopic number, m,n=%abundance
or
[(x)/100]a+[(y)/100]b
where , x,y=%abundance, y=100-x - 10% composition of isotopes can be calculated as...percentage composition of A:
[(avg. atomic mass-b)/a-b]100 - 11what is gram atomic mass/gram atom?numerical value of atomic mass of an element expressed in grams.
eg. 16amu(oxygen)⇒16g - 12how do you calculate gram atomic mass of oxygen?1amu=1.66*10^-24g
16amu=2.656*10^-23g
now, 1.66*10^-24g⇒1amu
1g⇒1/1.66*10^-24g
=6.022*10^23amu
1O2atom(16amu)⇒2.656*10^-23g
6.022*10^23 atoms⇒6.022*10^23*2.656*10^-23
=16g - 13how do you calculate no. of gram atoms of an element in a given sample?no.of gram atoms=mass of element(g)/atomic mass of element(g)
- 14calculate the gram atoms in 2.3g of sodium.we know that,
no.of gram atoms=mass of element(g)/atomic mass of element(g)
∴ no.of gram atoms in 2.3g of sodium
=2.3g/23g=0.1atoms - 15what is molecular mass?sum of masses of the atoms present in one molecule
eg. H2O=(2*1)+16=18amu - 16what is gram molecular mass/gram molecule?a quantity of substance whose mass in grams is numerically equally to its molecular mass
- 17what is the avogadros constant?6.022g10^23
- 18what is the relation of mole concept?1mol of any atom/molecule
= 6.022g10^23 atoms/molecules
=gram atomic/molecular mass of that atom/molecule - 19How do you calculate no. of gram molecules of an element in a given sample?no. of gram molecules=mass of a substance(g)/molecular mass of substance(g)
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- XI Chemistry Flashcards on Untitled, created by Suhani Terway on 02/06/2021.
- Created by
- Suhani Terway · Jun 2021
- Updated
- Jun 6, 2021
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